Motor suspension spring rebound damper



1932. w. H. HANSFORD MOTOR SUSPENSION SPRING REBOUND DAMPER Filed Dec. 22, 1930 Patented Dec. 13, 1932 UNITED STATE-S WALTER HALL I-IANSFORD, or EARLWOOD, NEAR SYDNEY, NEW SOUTH WALES,

AUs'rnALIAfl" J m MOTOR SUSPENSION SPRING REBOUND DAMPER Application filed December 22, 1930, Serial No. 504,137, i'and in Australia December 28, 1929;

Fig. 1 being a broken sectional view of the complete apparatus; and

Fig. 2 a broken sectional view of the spindle, vane, and valve.

The casing or cylinder consists of a base plate 10 and a cylindrical cap 11 spigot jointed to the base plate 10 as shown at 12 and fixed by two through pins 13which serve also as fixing bolts for which purpose they are extended through the chassis frame 1d,

behind which nuts are screwed onto them. The inner end of the vane spindle 15 is centered in a hole 16 bored in the interior face of the base plate 10 in alignment with a stuflt' ing boxl? formed in the ribbed up cap portion 18 of the cylinder body 11. The outer end of the spindle 15 is squared as shown at 19 and upon this square end the eye of a lever arm which is connected by a link to the spring crown or the axle of the vehicle is fixed by a key which engages the notch keyway 20. The chamber is divided into two sections by neatly fitted segmental blocks 21. The holding bolts 13 pass through these segmental blocks 21 and retain them in fitted position.

The interior faces 22 of the segmental blocks 21 are very neatly fitted to the spindle 15 to prevent oil leakage past the joint but the other three faces are close fits for the top, bottom, and wall of the chamber.

a slide vane 23 is fitted through the slot. This vane is a close sliding fit for the top, bottom, and side walls of the chamber, and two cross slots 24- are cut through one edge of it, the

ends of these slots emerging as shown at 25 The spindle 15 is transversely slotted and clear of the face of-the spindle 15. The regulatorspindle 26 is a close fit in an axial hole 27 bored through the vane spindle, the bore being extended into the lateral partof the vane 23 at the crossings of the grooveways 24;. At this placerflats 28 are formed on both sides of the regulator spindle 26., The outer end of-thespindle26 extends through a throat nut 29 screwed into the outer end 19 ofthe vane spindle; this nut bears against, a collar 80 which is integral with-the regulating spindle27, and a backing'washer 31 is set behind the collar 30. When the collar n'ut 29 is screwed hardhome the washer 31 is com pressed and leakage of oil along the regulating spindle is effectively checked thisspindle is adjusted bymeans'of a spannerapplied to its protruding flats 32, the adjusting beingeffectedwhjile the collar nut 29v-is slacked off. The area of clearance. for the passage of oil through the'grooveways 24 is determined by p the position of the flats 28. If the spindle 26 a be; so. adjusted that a, very small clearance only is allowed, then the cushioning effect of oil contained in the,; chambers (this'oil being introducedthrough the filler hole ,33) isa maximum, and the d'ampering effect will be a minimum. When the spindle is adjusted to allow more clearance, the cushioning effect is diminished. The apparatus may 1 therefore beadjusted quite readily by slightly rotating the controlispindle 2 6.to set the flat faces 28 for the required clearance for passage of oil from one pair of segmental chambers to the other pair of segmental chambers. The 85 flats 28 are parallel and consequently adjustment of the spindles position results in providing an equal clearance for passage of oil through both grooveways 24. The respective ends of the vane work in the respective 95 0 segmental chambers and when the spindle 15 is oscillated by the oscillatory movement of the axle of a car transmitted through the lever arm which is fitted on the spindle arm 19, the oil is placed under correspondtrol spindle 26 being regulated so that oil may t-IOQ' pass through these grooveways at a rate corresponding With the dampering or cushioning effect required for easing of the oscillatory motions of the vehicle consequent upon running over irregular road surfaces.

What I claim as my invention and desire to secure by LettersPatent is 1. In a suspension spring damper of the rocking vane segmental chamber type, a chamber having a base plate and a cap and being divided by partition segments held' by fixing bolts which clamp the chamber body to the base plate avane spindle footed in the base plate, a control spindle fitted axially in the vane spindle, crossed slot passageways in the vane connecting the four chambers, and fiats formed 011 the control spindle Where it meets the crossed slot passages, all constructed substantially as described with reference to the accompanyingdrawings.

2. In a suspension spring damper, a casing having an internal chamber, partitions arranged in said casing and subdividing said chamber, a; spindle pivotally mounted in said casing and having a slot therethrough, and a fiat vane fitted through said slot and having its ends snugly fitting the interior of the casing, said vane having crossed grooves formed in one side thereof connecting the portions of 7 said chamber lying at opposite sides of said vane.

3. In a suspension spring damper, a casing having an internal chamber, partitions arranged in said casing and subdividing said chamber, a spindle pivotally mounted in said casing and having a slot therethrough, and a flat vane fitted through said slot and having its ends snugly fitting the interior of the casing, said vane having crossed grooves formed inone side thereof connecting the portions of said chamber lying at opposite sides of said vane, said spindle having an axial bore communicating with said slot, and a control spindle mounted in said bore and controlling passage through said grooves.

In testimony whereof I afiix my signature.

WALTER HALL HANSFORD. 

